KR101919711B1 - Rotor assembly and high­speed rotary device comprising the same - Google Patents

Abstract

The present invention relates to a rotor sleeve assembly and a high-speed rotary device having the same. According to the present invention, a rotary shaft structure includes: a rotor installed to maintain an air gap inside a stator, and having a circular cross section; a sleeve coupled to surround the outer circumferential surface of the rotor; and a fixed member inserted and fixed between the rotor and the sleeve to prevent decoupling between the rotor and the sleeve in high-speed driving.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotor sleeve assembly,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor sleeve assembly and a high-speed rotating device including the rotor sleeve assembly, and more particularly, to a rotor sleeve assembly and a high-speed rotating device including the rotor sleeve assembly.

(Hereinafter referred to as a high-speed rotating device) such as a high-speed rotating motor that rotates at high speed, a method of fixing a sleeve to the outside of the rotor so as to withstand the centrifugal force generated due to high-

1 is a view schematically showing a rotating shaft structure of a conventional high-speed rotating device.

Referring to FIG. 1, a rotary shaft 1 of a conventional high-speed rotary apparatus is provided with an air gap inside a stator, and a rotor sleeve assembly 10 including a rotor 11 and a sleeve 13, And a shaft 20 coupled to both ends thereof.

 Bearings 30 and 40 for supporting the shaft 20 in contact with each other are provided at both ends of the shaft 20. The sleeve 13 is coupled to surround the outside of the rotor 11 of the high- Designed to withstand centrifugal forces.

In the case of the rotor sleeve assembly 10, the material of the rotor 11 and the material of the sleeve 13 are different from each other, and the rotor 11 and the sleeve 13 rotate idly (hereinafter, referred to as " (Hereinafter referred to as "

If the rotations of the rotors 11 and the sleeves 13 occur, there may be a problem in the output of the high-speed rotating device, resulting in a problem of reliability in high-speed operation.

Figure 2 is a simplified illustration of a conventional rotor sleeve assembly 10;

Referring to FIG. 2, a conventional rotor sleeve assembly 10 includes a rotor 11 and a sleeve 13 that is coupled with the rotor 11. The sleeve 13 is coupled so as to surround the outer circumferential surface of the rotor 11 in order to solve the centrifugal force caused by the high speed operation of the rotor 11.

The sleeve 13 is made of a different material. For example, the sleeve 13 is fixed to cover the rotor 11 through thermal press-fitting.

However, according to such a conventional structure, there is a concern that the fixed state between the rotor 11 and the sleeve 13 is weakened during high-speed operation, and the rotation of the rotor 11 and the sleeves 13 is caused to occur.

Therefore, a technical solution is required to prevent the rotations of the rotor 11 and the sleeve 13 in the rotor sleeve assembly 10 during high-speed operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotor sleeve assembly for a high-speed rotating apparatus which can prevent the rotation of a diaphragm from being generated by weakening a fixed state between the rotor and the sleeve due to high-speed operation and an external environment.

It is another object of the present invention to provide a high-speed rotating device including a rotor sleeve assembly capable of preventing the rotation of a diaphragm from being generated due to a reduced fixing state between the rotor and the sleeve due to high-speed operation and an external environment.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

The rotor sleeve assembly according to an embodiment of the present invention includes a rotor having a circular cross section and installed to maintain a gap inside the stator, a sleeve coupled to surround the outer circumferential surface of the rotor, and a rotor And a fixing member inserted and fixed between the rotor and the sleeve to prevent disengagement.

Preferably, the rotor is entirely made of a magnet material, the sleeve is made of a material different from that of the rotor, and the rotor and the sleeve can be joined by a thermal pressing method.

The plurality of fixing members may be disposed at predetermined intervals along the longitudinal direction of the rotor and the sleeve.

In addition, the plurality of fixing members may be arranged to be shifted from each other by a predetermined center angle.

The plurality of fixing members may include a first fixing member disposed at a front end portion of the rotor and the sleeve, a second fixing member disposed at a center of the rotor and the sleeve so as to have a central angle of 120 degrees with the first fixing member, And a third fixing member disposed at a rear end portion of the rotor and the sleeve so as to rotate in the same direction as the rotation direction of the second fixing member so as to have a central angle of 120 degrees with the second fixing member, .

The fixing member includes a pair of sleeve-side fixing portions, which are coupled through a portion of the outer side of the rotor at the side of the sleeve, through which the screw groove is formed through the hollow, and are coupled through the rotor in the cross- And a rotor penetration type fixing portion which is fastened through threaded grooves of the pair of sleeve side fixing portions.

In addition, the fixing member may be a member of a screw bar shape which passes through the rotor and the sleeve together.

The fixing member may be a bar-shaped member that is engaged with the rotor and the sleeve, and both ends of the fixing member exposed to the outside of the sleeve may be welded.

A high-speed rotating apparatus according to another embodiment of the present invention includes a stator, a rotor installed inside the stator to maintain a gap therein, a rotor having a circular cross section, a sleeve coupled to surround the outer circumferential surface of the rotor, And a bearing for contacting and supporting the shaft. The shaft is rotatably connected to the rotor through the opposite ends of the rotor.

Preferably, the plurality of fixing members are provided, and the plurality of fixing members may be spaced apart from each other by a predetermined distance along the longitudinal direction of the rotor and the sleeve.

In addition, the plurality of fixing members may be arranged to be shifted from each other by a predetermined center angle.

The plurality of fixing members may include a first fixing member disposed at a front end portion of the rotor and the sleeve, a second fixing member disposed at a center of the rotor and the sleeve so as to have a central angle of 120 degrees with the first fixing member, And a third fixing member disposed at a rear end portion of the rotor and the sleeve so as to rotate in the same direction as the rotation direction of the second fixing member so as to have a central angle of 120 degrees with the second fixing member, .

The fixing member includes a pair of sleeve-side fixing portions, which are coupled through a portion of the outer side of the rotor at the side of the sleeve, through which the screw groove is formed through the hollow, and are coupled through the rotor in the cross- And a rotor penetration type fixing portion which is fastened through threaded grooves of the pair of sleeve side fixing portions.

According to the rotor sleeve structure of the present invention, the fixed state between the rotor and the sleeve is weakened due to the high-speed operation and the external environment, so that the rotor and the sleeve made of different materials can be prevented from rotating.

Further, according to the rotor sleeve structure according to the present invention, there is no need for an additional magnetizing process such as manufacturing a magnetizing yoke separately after thermo-pressing between the rotor and the sleeve, which is advantageous in that the assembling property is excellent and the cost can be reduced .

In addition, according to the high-speed operation device including the rotor sleeve structure according to the present invention, it is possible to prevent a problem of an output phase by preventing the rotation of the rotor and the sleeves in the diaphragm beforehand, and to improve the reliability of high-speed operation.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a cross-sectional view schematically showing a rotating shaft structure of a conventional high-speed rotating device.
2 is a perspective view schematically showing a rotor sleeve assembly of a conventional high-speed rotating device.
3 is a perspective view schematically illustrating a rotor sleeve assembly of a high-speed rotating apparatus according to an embodiment of the present invention.
4 is a longitudinal cross-sectional view briefly showing a rotor sleeve assembly of a high-speed rotating apparatus according to an embodiment of the present invention.
5 is a cross-sectional view taken along the line "V-V" in Fig.
6 is an enlarged cross-sectional view of the region "VI" in Fig.
7 is a cross-sectional view schematically showing one modified example of the enlarged section shown in Fig.
8 is a cross-sectional view schematically showing another modification of the enlarged section shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. Further, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, when an element is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component But it should be understood that other components may be "interspersed " between each component, or that each component may be" connected ", "coupled ", or" connected "through other components.

Hereinafter, a rotor sleeve assembly according to an embodiment of the present invention and a high-speed rotating device including the rotor sleeve assembly will be described.

Generally, in a device such as a motor rotating at high speed (hereinafter referred to as a "high-speed rotating device"), a sleeve is coupled to the outside of the rotor so as to withstand the centrifugal force generated at high- Here, a product including the rotor and the sleeve is referred to as a 'rotor sleeve assembly'.

3 is a perspective view schematically illustrating a rotor sleeve assembly of a high-speed rotating apparatus according to an embodiment of the present invention.

Referring to FIG. 3, a rotor sleeve assembly 100 of a high-speed rotating apparatus according to an embodiment of the present invention includes a rotor 110, a sleeve 130, and fixing members 150, 160, and 170.

The rotor 110 is installed to maintain an air gap inside the unillustrated stator (i.e., the stator of the motor).

Specifically, the rotor 110 is a bar-shaped member having a circular cross-section as shown in the figure, and may be provided in the form of a magnet material as a whole.

The rotor 110 may be configured to rotate at a high speed by power application to a stator winding (not shown).

Here, the high-speed rotation (or high-speed operation) means a condition of about 100,000 rpm or more.

 However, it is not necessarily limited to this rpm condition, and may be applied to the case where the speed is higher than the normal operation speed (for example, 30,000 rpm or less).

The sleeve 130 is a pipe-shaped member that is coupled to enclose the rotor 110.

Specifically, the sleeve 130 may have an inner hollow having a constant diameter. The rod-shaped rotor 110 is inserted through the inner hollow of the sleeve 130.

Here, the rotor 110 may be entirely made of a magnet material, and the sleeve 130 may be formed of a material different from that of the rotor 110.

For example, the rotor 110 and the sleeve 130 may be joined by a thermo-compression method.

The sleeve 130 is coupled to the outside of the rotor 110 to solve the centrifugal force due to high-speed operation. However, the rotor 110 and the sleeve 130 have different materials.

First, heat is applied to the sleeve 130 to slightly enlarge the diameter of the inner hollow of the sleeve 130, and then the rotor 110 of the magnet material is inserted into the hollow of the sleeve 130.

When the sleeve 130 is cooled, the sleeve 130 is contracted to an initial shape, and the rotor 110 of the magnet material is fixed to the inside of the sleeve 130. This is referred to as a thermal indentation method.

However, the coupling between the rotor 110 and the sleeve 130 may be released by a thermo-pressurizing method under high-pressure and high-temperature operating conditions during high-speed operation. In this case, the rotor 110 and the sleeve 130 Can occur.

The present invention further includes fixing members 150, 160, and 170 for fixing the rotor 110 and the sleeve 130 to prevent the rotation of the diaphragm.

A plurality of fixing members 150, 160, and 170 may be provided.

Specifically, the plurality of fixing members 150, 160, and 170 may be spaced apart from each other by a predetermined distance along the longitudinal direction of the rotor 110 and the sleeve 130, .

Preferably, the fixing members 150, 160, and 170 may be composed of three members.

That is, the fixing members 150, 160, and 170 may include a first fixing member 150 disposed on the front side (i.e., a front end portion) of the rotor 110 and the sleeve 130, A second fixing member 160 disposed at the center and a third fixing member 170 disposed at a rear side (i.e., a rear end portion) of the rotor 110 and the sleeve 130.

4 is a longitudinal cross-sectional view briefly showing a rotor sleeve assembly of a high-speed rotating apparatus according to an embodiment of the present invention.

4, the positions of the first fixing member 150, the second fixing member 160, and the third fixing member 170 shown in the longitudinal section of the rotor sleeve assembly, , D1, D2).

The distance D1 between the first fixing member 150 and the second fixing member 160 and the distance D2 between the second fixing member 160 and the third fixing member 170 may be constant. Even if a larger number of fixing members are provided, it is preferable that all the intervals between the fixing members are maintained at a constant interval, which is advantageous in terms of balance of the rotary shaft during high-speed operation.

5 is a cross-sectional view taken along the line "V-V" in Fig.

Referring to FIG. 5, the installation angles of the first fixing member 150, the second fixing member 160, and the third fixing member 170 are different from each other through a transverse section of the rotor sleeve assembly Can be confirmed.

First, the second fixing member 160 disposed at the center, as compared with the first fixing member 150 disposed at the front side of the rotor sleeve assembly, receives a predetermined central angle a (e.g., 120 And the like) and are arranged to be shifted from each other.

The third fixing member 170 disposed at the rear side of the second fixing member 160 disposed at the center of the rotor sleeve assembly has a constant center angle a And the like) and are arranged to be shifted from each other.

That is, the three fixing members 150, 160, and 170 may be shifted with a center angle of 120 degrees from each other, which is advantageous in preventing eccentricity and balancing at high speed operation.

Hereinafter, the detailed structure of the fixing member according to the embodiment of the present invention will be described in detail with reference to FIGS. 6 to 8. FIG.

6 is an enlarged cross-sectional view of the region "VI" in Fig.

Referring to FIG. 6, as a first example of the fixing member 150 according to the present invention, the fixing member 150 includes a pair of sleeve-side fixing portions 151 and 153, a rotor-through fixing portion 155 .

The pair of sleeve-side fixing parts 151 and 153 may be members penetratingly coupled from the sleeve 130 side to a part of the outer side of the rotor 110.

Specifically, the pair of the sleeve-side fixing portions 151 and 153 may be provided with screw grooves through a hollow, which can be used as a portion to be screwed with both ends of the rotor penetrating fixing portion 155 have.

The rotor penetration type fixing portion 155 is coupled through the rotor 110 in the direction of the end surface (i.e., transverse surface) of the rotor 110. Both ends of the rotor penetration fixing portion 155 are inserted through the screw grooves of the pair of sleeve- And can be screwed and fixed.

For example, the pair of sleeve-side fixing portions 151 and 153 may be fixed to the sleeve 130 side to minimize deformation of the fixing member 150 due to stress concentration.

The rotor penetration type fixing portion 155 may be formed by using a screw bar or a rod-shaped member formed with threads through both ends, but the present invention is not limited thereto.

In order to insert the rotor penetration type fixing portion 155, an insertion hole may be formed in advance in the rotor 110, and a gap between the rotor penetration type fixing portion 155 and the pair of sleeve fixing portions 151 and 153 Combinations are not limited to any particular order and can be combined in various ways. For example, the rotor through-hole-like securing portion 155 can be inserted first, and a pair of sleeve-side securing portions 151 and 153 can be fastened and fixed to both ends thereof.

7 is a cross-sectional view schematically showing one modified example of the enlarged section shown in Fig.

Referring to FIG. 7, the fixing member 150 according to the embodiment of the present invention may be a screw bar member which is inserted through the rotor 110 and the sleeve 130 and is fastened together.

8 is a cross-sectional view schematically showing another modification of the enlarged section shown in Fig.

Referring to FIG. 8, the fixing member 150 according to the embodiment of the present invention may be a bar-shaped member which is fastened together through the rotor 110 and the sleeve 130.

7, it is preferable that both ends of the fixing member 150 exposed to the outside of the sleeve 130 are firmly fixed through the sleeve 130 when the screw connection is omitted. For this purpose, both ends of the fixing member 150 may be welded to the sleeve 130 to form a predetermined joint 159.

The fixing member 150 according to the embodiment of the present invention described with reference to Figs. 6 to 8 is preferably made of a non-magnetic material which does not affect the magnetic flux density.

Meanwhile, a high-speed rotating device including a rotor sleeve assembly according to an embodiment of the present invention can be provided. Here, the high-speed rotating device is a device that rotates at a high speed under a condition of about 100,000 rpm or more, and may be a motor or the like.

A high speed rotating device according to an embodiment of the present invention includes a rotor sleeve assembly 130 including a rotor 110 (see FIG. 3), a sleeve 130 (see FIG. 3), a fixing member 150 (See FIG. 1), bearings 30 and 40 (see FIG. 1), in addition to the stator 100 shown in FIG.

The shaft 20 (see FIG. 1) is connected through both ends of the rotor 110, and may be configured to rotate in conjunction with the high-speed rotation of the rotor 110.

The bearings 30 and 40 (see FIG. 1) are arranged to be in contact with each other through both ends of the shaft 20 (see FIG. 1) so as to support stresses and loads during high-speed rotation. And at least one of them may be provided.

As described above, according to the structure and the operation of the present invention, the fixed state between the rotor and the sleeve is weakened by the high-speed operation and the external environment, and the rotation of the rotor and the sleeve made of different materials can be prevented in advance.

Further, after the thermo-compression between the rotor and the sleeve, an additional magnetizing process such as manufacturing a magnetizing yoke separately is not required, so that the assembling property is excellent and the cost can be reduced.

As a result, it is possible to prevent the rotations of the rotors and the sleeves before they are turned off, thereby preventing an output problem during high-speed operation such as an electric motor and a compressor, thereby improving the reliability of high-speed operation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is obvious that a transformation can be made. Although the embodiments of the present invention have been described in detail above, the effects of the present invention are not explicitly described and described, but it is needless to say that the effects that can be predicted by the configurations should also be recognized.

100: Rotor sleeve assembly
110: Rotor
130: Sleeve
150, 160, 170: fixing member
151, 153: Sleeve side fixing portion
155: rotor penetration type fixing portion
159:

Claims (13)

A rotor installed inside the stator to retain the gap and having a circular cross section;
A sleeve coupled to surround the outer circumferential surface of the rotor; And
And a plurality of fixing members inserted and fixed between the rotor and the sleeve to prevent disengagement between the rotor and the sleeve during high-speed operation,
Wherein each of the plurality of fixing members passes through the rotor and the sleeve in a direction passing through the center of the cross section of the rotor,
Wherein the plurality of fixing members are spaced apart from each other so as to be spaced apart from each other in a longitudinal direction of the rotor and the sleeve and adjacent to each other are rotated by a predetermined center angle to be shifted from each other, Made of material
Rotor sleeve assembly.
The method according to claim 1,
Wherein the rotor is entirely made of a magnet material, the sleeve is made of a material different from that of the rotor,
The rotor and the sleeve are coupled in a thermo-compression manner
Rotor sleeve assembly.
delete delete The method according to claim 1,
Wherein the plurality of fixing members comprise:
A first fixing member disposed at a front end portion of the rotor and the sleeve;
A second fixing member arranged to rotate at a central angle of 120 degrees with respect to the first fixing member and disposed at the center of the rotor and the sleeve; And
A third fixing member arranged to rotate in the same direction as the rotation direction of the second fixing member so as to have a central angle of 120 degrees with the second fixing member and disposed at a rear end portion of the rotor and the sleeve;
≪ / RTI >
6. The method according to claim 1 or 5,
Wherein:
A pair of sleeve-side fixing parts joined to penetrate through an outer part of the rotor at the sleeve side and provided with screw grooves; And
A rotor through-hole-like fixing portion coupled to the rotor through-hole in a direction passing through the center of the cross-section of the rotor and having both ends fastened through threaded grooves of the pair of sleeve-side fixing portions;
≪ / RTI >
6. The method according to claim 1 or 5,
Wherein:
And is a member in the form of a screw bar which passes through the rotor and the sleeve together.
Rotor sleeve assembly.
6. The method according to claim 1 or 5,
Wherein:
And a bar-shaped member which is coupled to the rotor and the sleeve by passing therethrough,
And both ends of the fixing member exposed to the outside of the sleeve are welded to each other.
Rotor sleeve assembly.
Stator;
A rotor installed inside the stator to maintain a gap therebetween and having a circular cross section;
A sleeve coupled to surround the outer circumferential surface of the rotor;
A plurality of fixing members inserted and fixed between the rotor and the sleeve to prevent disengagement between the rotor and the sleeve during high-speed operation;
A shaft connected to both ends of the rotor and rotated; And
And a bearing for contacting and supporting the shaft,
Wherein each of the plurality of fixing members passes through the rotor and the sleeve in a direction passing through the center of the cross section of the rotor,
Wherein the plurality of fixing members are spaced apart from each other so as to be spaced apart from each other in a longitudinal direction of the rotor and the sleeve and adjacent to each other are rotated by a predetermined center angle to be shifted from each other, Made of material
High speed rotating device.
delete delete 10. The method of claim 9,
Wherein the plurality of fixing members comprise:
A first fixing member disposed at a front end portion of the rotor and the sleeve;
A second fixing member arranged to rotate at a central angle of 120 degrees with respect to the first fixing member and disposed at the center of the rotor and the sleeve; And
A third fixing member arranged to rotate in the same direction as the rotation direction of the second fixing member so as to have a central angle of 120 degrees with the second fixing member and disposed at a rear end portion of the rotor and the sleeve;
And rotating the rotating shaft.
The method according to claim 9 or 12,
Wherein:
A pair of sleeve-side fixing parts joined to penetrate through an outer part of the rotor at the sleeve side and provided with screw grooves; And
A rotor through-hole-like fixing portion coupled to the rotor through-hole in a direction passing through the center of the cross-section of the rotor and having both ends fastened through threaded grooves of the pair of sleeve-side fixing portions;
And rotating the rotating shaft.

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